How to Make a Hologram Projector

By Andrew Latham
Hologram images are created by the interference pattern of a laser.
laser image by serge simo from <a href='http://www.fotolia.com'>Fotolia.com</a>

There are two main types of holograms: reflection and transmission. Reflection holograms store the information of a 3D image in a thick photographic emulsion sandwiched between two glass plates and must be viewed with a bright spotlight. Transmission holograms use mirrors and two laser sources, a reference beam and the object beam, to print the hologram on film and can be viewed with the same laser you use to create the image. Each type requires a different projector. Although building a commercial hologram projector is too complex a project to describe in a short article, it is possible to build basic transmission and reflection hologram projectors out of a bright spot light and a laser beam, respectively.

Reflection Hologram Projector

Step 1

Place a bright spot light at the same distance and angle from the hologram plate as when you first exposed the film. You cannot use fluorescent lights, lasers or light from a frosted bulb to view a reflection hologram projector.

Step 2

Switch on the spot light and check the quality of your hologram.

Step 3

Adjust the position of the hologram by moving it from side to side and tilting it until you get the brightest and most focused hologram possible.

Transmission Hologram Projector

Step 1

Place the laser and the hologram plate in the same location you used to expose the hologram. If you are using a different location, place them at the same distance and angle to each other.

Step 2

Switch on the laser. The image you see will be the exact copy of the original, what is called a virtual image.

Step 3

Place the laser head-on from the hologram plate to get a clearer image. The viewing angle with the head-on illuminating will vary slightly, but the quality of the image will improve. This is a good option if you are new to hologram projections.

About the Author

Andrew Latham is a seasoned copywriter for both print and online publishers. He has a Bachelor of Science, majoring in English, a diploma in linguistics and a special interest in finance, science, languages and travel. He is the owner of LanguageVox.com, a company based in Charlottesville, Virginia, which provides writing, interpreting and translating services for English and Spanish audiences.